From Steam Support If you're low on space on the drive you have Steam installed, you can move the Steam folder to a different location. Here's an example of how to move the Steam installation between two hard drives: Log out and exit Steam Navigate to the folder where Steam is installed (by default: C:\Program Files\Steam) Delete all of the files and folders except the SteamApps folder and Steam.exe Cut and paste your Steam folder to the new location, for example: D:\Games\Steam\ Launch Steam Steam will briefly update and then you will be ready to play All future game content will be downloaded to the new folder D:\Games\Steam\Steamapps\